{"product_id":"hw-685-current-to-voltage-converter-module-4-20ma-signal","title":"HW-685 Current to Voltage Module 0\/4-20mA to 0-3.3V\/5V\/10V","description":"\n\u003ch2\u003eHW-685 Current to Voltage Transmitter Signal Converter Module\u003c\/h2\u003e\n\u003cp\u003eConvert 0\/4–20mA current loop signals into precise 0–3.3V, 0–5V, or 0–10V voltage outputs with the \u003cstrong\u003eHW-685 Current to Voltage Signal Module\u003c\/strong\u003e. Ideal for industrial automation, PLC interfacing, sensor integration, and any application that requires accurate signal conversion between current and voltage domains. Compact, reliable, and easy to configure — this module is a must-have for engineers and electronics enthusiasts alike.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Input Range:\u003c\/strong\u003e Accepts both 0–20mA and 4–20mA current loop signals\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Voltage Output:\u003c\/strong\u003e Selectable output of 0–3.3V, 0–5V, or 0–10V to match your system requirements\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Supply Voltage:\u003c\/strong\u003e Operates from 7–36V DC (supply must exceed 12V for 10V output)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Zero \u0026amp; Span:\u003c\/strong\u003e On-board ZERO and SPAN potentiometers for precise calibration of minimum and maximum output voltages\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse Polarity Protection:\u003c\/strong\u003e Built-in protection prevents damage from accidental reverse wiring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Indicator LED:\u003c\/strong\u003e D2 status LED confirms power-on operation at a glance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Measures just 42mm × 25mm × 10mm — easy to integrate into tight enclosures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLightweight:\u003c\/strong\u003e Only 11g package weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eHW-685\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0–20mA \/ 4–20mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0–3.3V \/ 0–5V \/ 0–10V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e7–36V DC (≥12V required for 10V output)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e42mm × 25mm × 10mm (1.65″ × 0.98″ × 0.39″)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e11g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eReverse Polarity Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eALLOYSEED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eWire the module according to the terminal definitions printed on the board.\u003c\/li\u003e\n  \u003cli\u003eApply a power supply voltage between 7–36V DC. The \u003cstrong\u003eD2 LED\u003c\/strong\u003e should illuminate — if it doesn't, check your wiring connections.\u003c\/li\u003e\n  \u003cli\u003eWith the current input at its \u003cstrong\u003eminimum value\u003c\/strong\u003e (0mA or 4mA), adjust the \u003cstrong\u003eZERO potentiometer\u003c\/strong\u003e until VOUT reads the desired minimum (e.g. 0.0V).\u003c\/li\u003e\n  \u003cli\u003eWith the current input at its \u003cstrong\u003emaximum value\u003c\/strong\u003e (20mA), adjust the \u003cstrong\u003eSPAN potentiometer\u003c\/strong\u003e until VOUT reads the desired maximum (3.3V, 5V, or 10V).\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × HW-685 Current to Voltage Converter Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/22awg-glass-tube-fuse-holder-5x20mm-6x30mm-screw-type-10-pack\"\u003e10-Pack 22AWG Glass Tube Fuse Holder 5x20mm \u0026amp; 6x30mm Screw\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/100w-dual-port-car-charger-starlink-mini-fast-charging\"\u003e100W Dual-Port Car Charger – Fast Charging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/140w-usb-c-fast-charging-adapter-auto-power-off-overcharge-protection\"\u003e140W USB-C Fast Charger with Auto Power-Off Overcharge Protection\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor safety standards related to electrical and electronic equipment, refer to guidance from the National Institute of Standards and Technology (NIST).\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Analog-to-digital_converter\" target=\"_blank\" rel=\"noopener\"\u003eAnalog-to-digital converter\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What power supply voltage is required for the HW-685 current to voltage converter module?\u003c\/h4\u003e\n\u003cp\u003eA: The HW-685 module operates on a supply voltage of 7–36V DC. However, if you need the output to reach 10V, you must ensure the supply voltage is greater than 12V. A standard 12V or 24V industrial power supply works well for most applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can the HW-685 module handle both 0–20mA and 4–20mA current loop inputs?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The HW-685 current to voltage signal converter supports both 0–20mA and 4–20mA input ranges. You can calibrate the minimum output using the ZERO potentiometer and the maximum output using the SPAN potentiometer to match your specific sensor or PLC signal range.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the HW-685 module protected against reverse polarity wiring?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The HW-685 features built-in reverse polarity protection, meaning accidental reverse connection of the power supply will not damage the board — giving you peace of mind during installation and testing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What voltage outputs can I select on this current to voltage module?\u003c\/h4\u003e\n\u003cp\u003eA: The module supports three selectable output voltage ranges: 0–3.3V (ideal for microcontrollers like Arduino or STM32), 0–5V (for standard analog inputs), and 0–10V (for industrial PLCs and control systems). Output is adjustable via the onboard ZERO and SPAN potentiometers.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What power supply voltage is required for the HW-685 current to voltage converter module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The HW-685 module operates on a supply voltage of 7–36V DC. However, if you need the output to reach 10V, you must ensure the supply voltage is greater than 12V. A standard 12V or 24V industrial power supply works well for most applications.\"}}, {\"@type\": \"Question\", \"name\": \"Can the HW-685 module handle both 0–20mA and 4–20mA current loop inputs?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The HW-685 current to voltage signal converter supports both 0–20mA and 4–20mA input ranges. You can calibrate the minimum output using the ZERO potentiometer and the maximum output using the SPAN potentiometer to match your specific sensor or PLC signal range.\"}}, {\"@type\": \"Question\", \"name\": \"Is the HW-685 module protected against reverse polarity wiring?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. The HW-685 features built-in reverse polarity protection, meaning accidental reverse connection of the power supply will not damage the board — giving you peace of mind during installation and testing.\"}}, {\"@type\": \"Question\", \"name\": \"What voltage outputs can I select on this current to voltage module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module supports three selectable output voltage ranges: 0–3.3V (ideal for microcontrollers like Arduino or STM32), 0–5V (for standard analog inputs), and 0–10V (for industrial PLCs and control systems). Output is adjustable via the onboard ZERO and SPAN potentiometers.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"United States","offer_id":47710864801897,"sku":"200007763:201336106","price":23.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S571d53b5164f497da9cf9b1bc41e850fz.webp?v=1782061208","url":"https:\/\/oasis-select.com\/products\/hw-685-current-to-voltage-converter-module-4-20ma-signal","provider":"Oasis Select","version":"1.0","type":"link"}